SU1600878A1 - Roll assembly for sheet-rolling mill - Google Patents

Abstract

The invention relates to rolling production, namely to the designs of six-roll systems of sheet mills. The purpose of the invention is to increase the durability of the rolls by dispersing the contact surfaces of the edges of the barrel of a short roll with a longer barrel and improving the accuracy of rolling. In the six-roller unit, the support rolls 3 have barrels of shorter length than the adjacent intermediate rolls 2. The end surfaces of the roll barrels 3 are inclined at equal angles to the axis of rotation of the rolls. Under this condition, the longitudinal section of the roll barrel 3 may have the form of an equilateral trapezoid and (or) a parallelogram. This makes it possible to increase the life of the rolls by dispersing the contact surface of the edges of the barrel of the short roll with the barrel of the adjacent roll of greater length. The use of the proposed unit allows reducing the consumption of rolls, reducing the number of transshipments, which in turn leads to an increase in the productivity of the mill. 3 il.

Description

one

(21) .4629199 / 27-02

(22) 12.30.88

(46) 10/23/90. Bul No. 39

(71) All-Union Scientific Research and Design Institute. There is a metallurgical engineering them. A.I.Tselikova

(72) V.V.Pavlenko, A.I.Gertsev, S.H.Siushev, Yu.V.Gessler, V.A.Pravichenko, Y.E.Hazhilin

and G.A. Maksimenko (53). 621.771.23 (088.8) (56) Patent of the USSR No. 536749, cl. B 21 B 1/22, 1976.

For Japan No. 63-60006, cl. At 21 At 13/14, published. 03/16/88.

(54) KNOT OF ROLLS FOR SHEET MILL

(57) The invention relates to rolling production, in particular, to designs of six-roll systems of sheet mills. In the six-roller unit, the support rolls 3 have barrels of shorter length than the adjacent intermediate rolls 2. The end surfaces of the roll barrels 3 are inclined at equal angles to the axis of rotation of the rolls. Under this condition

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The longitudinal section of the roll barrel 3 may be in the form of an equilateral trapezium and (or) a parallelogram. This makes it possible to increase the service life of the rolls by dispersing the contact surface of the edges of the barrel of the short roll with the barrel.

thirty

The invention relates to the field of rock production, more specifically to the designs of six-high systems of developmental mills. ,

The purpose of the invention is to increase the rolls resistance by dispersing the surface of contact of the edges of a barrel of a roll with a longer barrel and an increase in rolling accuracy.

Figure 1 presents the layout of the node rolls six-roll stand in which the support-rolls have a barrel of shorter length than the adjacent intermediate rolls; Fig. 2 shows a swath with a short barrel having a longitudinal section in the form of an equilateral trapezium; in FIG. 3 - the same, the longitudinal section of the barrel of the short roll has the shape of a parallelogram.

The roll assembly consists of two work rolls 1, two intermediate rolls 2 and two support rolls 3, Rolls 2 and 3 relative to each other have different diameters and different lengths of barrels 4, with rolls 3 shorter

rolls 2..

The end surfaces of the rolls J are netted at the same angles of about.

to the axis of rotation of the roll.

At the same time, based on the described us-4U catch of equal inclination of the end surfaces of the barrel of the short support roll, its longitudinal section may take the form of a longitudinal section c. the form of an equilateral t of a rappea and (or) 4b parallelogram.

To ensure the required thickness tolerances, the inclination angle can be such that the difference between the rolls forming the barrel KopoTKoi o does not exceed 5-10% ..-,

 To obtain minimal fluctuations in the thickness across the width of the rolled strips (cross raznotsolpchnnost) short roll is performed with an longitudinal-55th section in the form of an equilateral is achieved symmetry between the roll gap about the axis

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adjacent roll of greater length. The use of the proposed unit allows reducing the consumption of rolls, reducing the number of transshipments, which in turn leads to an increase in the mill productivity. 2 з.п, ф-л, 3 Il.

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4U 4b

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rolling during the rotation of the rolls and the oscillations of the thicknesses; the widths of the strips will be determined only by the difference in the lengths of the contact areas between the rolls. To obtain minimal fluctuations in thickness along the length of rolled strips (longitudinal thickness variation), a short roll is made with a longitudinal section in the form of a parallelogram.

In this case, when the rollers rotate, the length of the contact between them remains constant, which contributes to the stabilization of the thickness of the strips in length due to relatively constant flattening.

The operation of the node is as follows.

During the rotation of the rolls 2 and 3 due to the inclination of the ends to the longitudinal axis, the contact of the rolls with each other due to different diameters of the rolls is carried out continuously at different points of the longer roll, forming a contact surface of width, L. Thus, each point of this surface is much less frequently encountered with the edge of the roll barrel 3 as compared with the known f roll sets, which contributes to reducing the wear of the rolls. With a symmetrical arrangement of the ends of the barrel of the rolls 3, when the rolls rotate, there is no significant change in the thickness of the roll along the width, and with a parallel arrangement of the ends, the thickness of the roll along the length of the roll remains constant,

. The use of the invention allows to reduce the consumption of rolls, to reduce the number of transshipments, which provides an increase in the productivity of the mill.

Claims (3)

1. A rolls mill of a sheet rolling mill containing at least two rolls of different diameters in contact with each other, the barrel length of one of which is shorter than the barrel of the other, which is more than long and increase the accuracy of rolling the ends of the barrels of the short roll are inclined to the longitudinal axis of the roll. 2, Knot pop.1 | characterized in that the ends of the barrels of the short roll are made symmetrically relative to the vertical axis of the roller unit. 3. Node according to claim 1, characterized in that the ends of the barrels of the short roll are parallel. fej